docs: def resolve(self, container: Container, fn: str) -> str:
          """
          Ensures that relative paths are transformed into absolute paths.
          """
          bug = self.__mgr_bug[container.bug]
          fn_orig = fn
  
          if not os.path.isabs(fn):
              fn = os.path.join(bug.source_dir, fn)
              logger.debug("converted relative path to absolute path: %s -> %s",
                           fn_orig, fn)
  
          return fn